154 results about "Nanoring" patented technology

Carbon nanostructures are mass produced from graphite. In particularly preferred aspects, graphene is thermo-chemically derived from graphite and used in numerous compositions. In further preferred aspects, the graphene is re-shaped to form other nanostructures, including nanofractals, optionally branched open-ended SWNT, nanoloops, and nanoonions.

One-dimensional ring structures form M13 viruses were constructed by two genetic modifications encoding binding peptides and synthesis of a heterobifunctional linker molecule. The bifunctional viruses displayed an anti-streptavidin peptide and hexahistidine (SEO ID NO: 4) peptide at opposite ends of the virus as pIII and pIX fusions. Stoichiometic addition of the streptavidin-NiNTA linker molecule led to the reversible formation of virus-based nanorings with circumferences corresponding to lengths of the packagable DNAs. These virus-based ring structures can be further engineered to nucleate inorganic materials and form metallic, magnetic, or semiconductor nanorings using trifunctionalized viruses.

The invention discloses a preparation method of a gold-silver composite nanoring. The preparation method comprises the following steps: placing a silver target material in water while stirring, and irradiating the silver target material for 10-30 minutes by using laser with the wavelength of 1064nm, the power of 30-50mJ / pulse, the frequency of 5-15Hz and the pulse width of 5-15ns to obtain a silver nanoparticle colloid solution; then, irradiating the silver nanoparticle colloid solution for 2-4 minutes while stirring by using laser with the wavelength of 532nm, the power of 34-38mJ / pulse, the power of 5-15Hz and the pulse width of 5-15ns to obtain a monodisperse silver nanoparticle colloid solution; then, adding the monodisperse silver nanoparticle colloid solution to a 0.13-0.17mmol / L chloroauric acid according to a volume rate being (0.8-1.2): (0.8-1.2), and stirring for at least 30 minutes to prepare the gold-silver composite nanoring in which a silver nanoring is modified with gold nanoparticles, wherein the ring diameter of the silver nanoring is 10-25nm, the thickness of the silver nanoring is 3-6nm and the particle diameter of the gold nanoparticles is 3-5nm. The gold-silver composite nanoring prepared by the preparation method disclosed by the invention is expected to be applied to a Raman detection technology based on a near-infrared excitation SERS (Surface Enhanced Raman Scattering) effect.

A substrate is described that is suitable for surface enhanced optical detection. The substrate comprises an electrically conductive layer (110), such as for example a gold layer. It furthermore comprises at least one nanoparticle (1404) comprising an electrically conductive portion. The electrically conductive portion in some embodiments provides an opening to an underlying material. Such at least one nanoparticles (1404) thus may for example be a nanoring, a nanodisc, or a non-spherical nanoshell. The substrate furthermore comprises a dielectric spacer (1406) for spacing the electrically conductive layer from the at least one nanoparticles. The dielectric spacer (1406) is a dielectric material substantially only present under the at least one nanoparticle (1404), leaving the electrically conductive layer (110) uncovered from dielectric material at positions away from the nanoparticles (1404). The at least one nanoparticle (1404) and the dielectric spacer (1406) are interfaced along a first major surface (1402) and the at least one nanoparticle (1404) comprises an upstanding surface not in line with an upstanding surface of the dielectric spacer (1406).

The invention relates to a preparation method of a silver nanoring. The preparation method comprises the following steps of: adopting a high-temperature stirring heating method, taking ethylene glycol as a solvent and reducing agent, taking polyvinylpyrrolidone as a surface protectant, and performing centrifugal cleaning on a reaction product to obtain a silver nanoring solution, wherein the prepared silver nanoring has a perfect circular and smooth surface and an oval section, the diameter of the ring is of 4-20mu m, the line thickness of the section of the ring is 50-200nm, and the whole silver nanoring is of a secondary twin structure. The method has the characteristics of simple process and low cost, the prepared silver nanoring has a smooth surface and an excellent crystal structure, and the silver nanoring can be used in the fields of optical nano-cavities, nano-photoelectric devices and the like.

Low-aspect ratio nanostructures, such as nanocups, nanorings, and arrays of nanocups and nanorings, methods of fabrication of nanostructures, and methods of using nanostructures are disclosed.

A nontemplated method for producing Alpha-ferric oxide nanorings comprises the steps of collecting 9-50 mmol / L ferric trichloride aqueous solution, adding equivoluminal 3-10 mmol / L sodium dihydrogen phosphate aqueous solution, stirring, placing into a sealed reaction vessel, sealing, performing constant temperature treatment at 180-270 DEG C for 12-72 hours, taking out of the reaction vessel, air cooling, separating red precipitate in the vessel, water washing for 2-5 times, and oven-drying in the air at 60-80 DEG C to obtain Alpha-ferric oxide nanorings. The inventive method has the advantages of narrow size distribution of Alpha-ferric oxide nanoring particles, uniform adjustment of ring internal diameter, easily accessible raw materials, simple production process, good product reproducibility, no pollution, and applicability to large-scale production.

The invention relates to an unicell detector based on a nano fiber probe, which comprises a nano probe, a light source unit, a micro operation system, an electricity detection unit, a cellular localization system and a photon detection unit, an innermost layer of the nano probe is a fiber layer, the outer wall of the fiber layer is wrapped with a nano ring electrode layer, and the outer wall of the nano ring electrode layer is wrapped with an insulating layer. A manufacturing method of the unicell detector based on the nano fiber probe comprises the steps of drawing, sputtering, making the insulating layer and cutting focused ion beam. The unicell detector has high sensitivity and can realize the unicell grade detection, compared with a traditional detection means by crushing millions of cells, the required cell sample amount is greatly reduced, and the success rate of disease detection at early stage can be increased. The unicell detector can perform in-vivo cell detection and can avoid the false appearance generation during a cell processing process. The space-time resolution and detectable target object scope can be greatly enhanced, and a biochemistry mechanism in the unicell enables real-time detection and analysis.

The invention discloses a novel metal cup-cylinder composite nano structure array which is formed by sequential arrangement of metal nano structure array units. The metal nano structure array units are of a metal cup-cylinder composite nano structure which comprises a cup-shaped metal nano outer wall, and the center of a cup groove formed by the metal nano outer wall is a cylindrical metal nano particle. The invention also discloses a preparation method of the metal nano structure array, and the preparation method comprises the processing steps of preparing a single-layer orderly polrvinyl benzene nano ball compact arrangement, preparing a single-layer orderly polrvinyl benzene nano ball non-compact arrangement, preparing a nano annular-structure array mask made of composite materials, preparing a silicon-nano-structure array template, preparing the metal cup-cylinder composite nano-structure array, and the like. The metal nano array structure provided by the invention has gaps with smaller nano sizes and can be used for realizing the Roman detection of a single biomolecule; and according to the preparation method, the compatibility is good, the efficiency is high and the cost is low.

The present invention discloses preparation process of nanometer TiO2 ring, and features that through emulsion polymerization process to synthesize nanometer polystyrene ball, the subsequent sol-gel process to coat the nanometer polystyrene ball with colloidal TiO2 particle in the thickness of 40-500 nm, and final heat treatment to eliminate nanometer polystyrene ball, nanometer TiO2 ring is prepared. The present invention prepares nanometer polystyrene ball of different diameters as template so as to prepare nanometer TiO2 ring of required size, and the preparation process of nanometer TiO2 ring is simple, low in cost and suitable for large scale production. The said process may be also applied in preparing nanometer ring of ZnO, SnO2, Al2O3 and other oxides.

This invention discloses hollow CdS, CdSe or CdTe nanoring, which has hexagonal structure. The outer diagonal length is 200-260 nm, and the inner diagonal length is 50-70 nm. The hollow CdS or CdSe nanoring has a hexagonal phase, while the hollow CdTe nanoring has a cubic phase. The CdS, CdSe or CdTe nanoring can be used to fabricate biosensors or microelectronics. This invention also discloses a method for preparing hollow CdS, CdSe or CdTe nanoring.

The invention discloses a preparation method of a silver core-gold shell hexagonal nanometer ring. Firstly, silver nanometer disc solution is prepared by a seed-medium growth method; then, the silver core-gold shell hexagonal nanometer ring is prepared by an electric replacement method; the process of preparing the silver nanometer disc solution is as follows: firstly, mixed solution of a precursor reagent and a protective agent is obtained; then, first reducing agent solution is taken and dripped in the mixed solution to obtain silver seed solution; then, growth solution is prepared; and finally, the silver seed solution and the growth solution are mixed to obtain the silver nanometer disc solution; the process of preparing the silver core-gold shell hexagonal nanometer ring is as follows: firstly, chloroauric acid solution and the silver nanometer disc solution are mixed to obtain purple solution; then, precipitates obtained by centrifugating the solution are renewedly dispersed in de-ionized water to obtain lavender solution; and nanometer particles in the lavender solution are the silver core-gold shell hexagonal nanometer rings. The preparation method has the advantages of simple preparation process, low preparation cost, high yield and uniform morphology of the prepared nanometer ring.

A process for preparing boron nitride nanoring and nanopipe, belonging to the technical field of preparing nano material, which in detail is a process for preparing nano ring and nano pipe by applying the heated solid material producing gas or evaporated solid material producing pressure, the process is carried out under low pressure which avoids the high temperature and high pressure, the equipment needed is simple and mass production of low cost is easily to be realized. The raw material is common chemical agent or chemical materials and the process is simple, which is good for increasing the product yield and reduces the cost; the parameter of the reaction is easy to be monitored and controlled, the reaction mechanism is easy to be researched to find out the critical influencing factors and stabilizes the technological condition in a short time; the invention is also environment-friendly

The invention discloses a preparation method of an alpha-phase ferric oxide / platinum hybridized nanoring, relating to a composite material. The invention provides a preparation method of an alpha-phase ferric oxide / platinum hybridized nanoring, which is capable of improving the photocatalytic activity of alpha-phase ferric oxide, simple in process and mild in condition. The preparation method comprises the following steps of (1) preparing a water-soluble ferric salt solution, and adding acid phosphate and sulfate; (2) carrying out ultrasound treatment on the solution obtained in the step (1), then, transferring the solution into a reaction kettle, sealing the reaction kettle, and heating to react; (3) cooling the solution to the room temperature after the reaction is complete, centrifugally separating precipitates at the bottom of the kettle, washing, and drying to obtain an alpha-phase ferric oxide nanoring; (4) preparing a chloroplatinic acid solution, then, sequentially adding absolute ethyl alcohol and the alpha-phase ferric oxide nanoring, carrying out ultrasound treatment, then, drying and collecting the obtained powder; and (5) immersing the powder obtained in the step (4) into ethylene glycol, heating to react, then, washing the product, and drying the product to obtain the alpha-phase ferric oxide / platinum hybridized nanoring.

One-dimensional ring structures form M13 viruses were constructed by two genetic modifications encoding binding peptides and synthesis of a heterobifunctional linker molecule. The bifunctional viruses displayed an anti-streptavidin peptide and hexahistidine (SEQ ID NO: 4) peptide at opposite ends of the virus as pIII and pIX fusions. Stoichiometic addition of the streptavidin-NiNTA linker molecule led to the reversible formation of virus-based nanorings with circumferences corresponding to lengths of the packagable DNAs. These virus-based ring structures can be further engineered to nucleate inorganic materials and form metallic, magnetic, or semiconductor nanorings using trifunctionalized viruses.

The invention provides a magnetic field sensor utilizing the giant magnetoresistive effect of a ferromagnetic nano-ring, and belongs to the technical field of magnetic nano-sensors. The sensor is composed of a ferromagnetic nano-ring prepared on a substrate of nanometer size and a group of lead wires; the group of lead wires connected to the two ends of the ring also serve as a constant current source connecting wire and a voltage measurement connecting wire; the outside diameter D of the ferromagnetic nano-ring is 7 nm-10 um; the inside diameter d is smaller than the outside diameter D; the width of the ring is 5 nm-1 um; and the thickness of the nano-ring is 1 nm-500 nm. The sensor utilizes the ferromagnetic nano-ring under the action of the outside magnetic field, and the resistance the ferromagnetic nano-ring changes greatly, so as to detect the change of the outside magnetic field; the manufacture is very simple; the output signal is large; and the response is fast. The sensor is especially applicable to the detection of the threshold value of the magnetic field change; besides, the magnetic field sensitivity of the magnetic field transformation point can reach 2-10 percent / Oe or is higher than 2-10 percent / Oe, and the sensor also can serve as a magnetic cell.

The invention relates to a precious metal nanoring and a preparation method thereof. According to the method, an Au nanosheet or a decanedron Au nano particle protected by diallyldimethylammonium chloride serves as a template, M-Ag grows on the surface of the Au nanosheet or the decanedron Au nano particle in a directional mode, and then a round or polygonal Au / M-Ag nanoring is obtained by selectively etching Au. The Au / M-Ag nanoring prepared through the method is smooth in surface, uniform in size, high in purity and capable of being produced on a large scale. The Au / M-Ag nanoring prepared through the method and protected through a protective agent has high water solubility and is beneficial for application in biology in the future. The Au / M-Ag nanoring prepared through the method contains a high-index crystal face, is good in catalytic activity and is a potential formic acid fuel battery anode catalyst. The method is simple in manufacturing technology, short in reaction time, low in cost and low in equipment requirement and has good industrial application prospects.

An oxidation method for producing Gamma-ferric oxide nanorings comprises the steps of collecting ferric trichloride aqueous solution, adding equivoluminal sodium dihydrogen phosphate aqueous solution, stirring, placing into a sealed reaction vessel, sealing, performing constant temperature treatment at 180-270 DEG C for 12-72 hours, taking out of the reaction vessel, air cooling, separating red precipitate in the vessel, water washing, and oven-drying to obtain Alpha-ferric oxide nanorings; placing into a sealed furnace, introducing reducing gas, heating to 300-600 DEG C, keeping at the temperature for 1-10 hours, and naturally cooling to room temperature to obtain ferroferric oxide nanorings; and adding into the furnace, heating to 100-600 DEG C under oxidative atmosphere, keeping at the temperature for 1-5 hours, and naturally cooling to room temperature to obtain Gamma-ferric oxide nanorings. The inventive method has the advantages of simple equipment, simple production and operation, good product reproducibility, low cost, no pollution, and applicability to large-scale production.

The invention relates to the technical field of nano negative electrode materials, in particular to a preparation method of a high-performance lithium ion battery negative electrode material, namely acore-shell structure FeS2 <at> C nano ring. The method comprises the following steps of: 1) preparing alpha-Fe2O3 nanoring particles; 2) that prepare alpha-Fe 2O 3 is coat with organic layer to prepare alpha-Fe2O3 <at> RF nanoring particles; 3) the prepared alpha-Fe2O3 <at> RF nanoring particles are heat treated even if the organic matter is carbonized to obtain Fe3O4 <at> C nanorings; 4) sulfiding the obtained Fe3O4 <at> C to obtain FeS2 <at> C nanoring particles; 5) The obtained FeS2 <at> C nano-ring particles are made into button cells for electrochemical testing. The invention has simpleformula, simple operation, good repeatability, high product purity, abundant raw materials, environment-friendly type, regular material structure, good stability, and high capacity as negative electrode material.

The invention relates to a preparation method for a gold nanoring. The preparation method comprises the following steps: dissolving a palladium nano sheet, ascorbic acid and a dispersing agent into a solvent, wherein in the palladium nano sheet, the concentration of palladium atoms in a solution is 2.0*10<-4>-1.4*10<-3>mol / L, and the concentration of the ascorbic acid in the solution is 0.1-0.5mol / L; and then, injecting a chloroauric acid aqueous solution into the solution, and reacting at a temperature of 0-35 DEG C to obtain the gold nanoring, wherein a molar ratio of the ascorbic acid to the palladium atoms in the palladium nano sheet is 7:1 to 25:1. The preparation method is simple, is high in repeatability and is low in cost; and the prepared gold nanoring has a hollow structure, is uniform in dimension and is good in dispersion, and is adjustable in dimension and wall thickness.

The invention discloses a gold nanoring stacked array substrate with surface enhanced Raman scattering and a preparation method. The preparation method includes that standing wave effect in a photoetching process is utilized, in other words, surface reflection of an incident light substrate material interferes with incident light to form a specific stacked three-dimensional structure on photoresist, at the same time, multi-beam laser interference photoetching technology distributes and arranges the stacked three-dimensional structure according to a specified period, and a nano-thickness gold film is sputtered to form a gold nanoring stacked array. The structure has effect of surface enhanced Raman scattering and can be used for substrate materials for Raman scattering detection to effectively enhance Raman signals of detected substances.

The invention belongs to the field of nanometer materials, and specifically discloses a BiOCl nanoring and a synthetic method thereof. The synthetic method comprises the following steps: (1) subjecting an aqueous solution containing Bi3+, Cl- and polyethylene glycol to a reaction under heating so as to obtain a BiOCl nanosheet; and (2) etching the BiOCl nanosheet in an acid fluid. The synthetic method provided by the invention can obtain the BiOCl nanoring, and fills the blank of synthesis of the BiOCl nanoring; meanwhile, the BiOCl nanoring obtained by using the synthetic method provided by the invention has higher photocatalytic activity compared with a conventional BiOCl nanoring with a non-porous center. Moreover, the synthetic method provided by the invention has simple steps and is easy to control; and the BiOCl nanoring obtained by using the synthetic method provided by the invention has regular morphology, high scientific research values and high photocatalytic application values.

The invention discloses preparation and an application of a magnetic nanoring microwave absorbing agent, and particularly relates to a magnetic nanoring microwave absorbing agent with characteristics of good monodispersity and homogeneity, high magnetic responsiveness, excellent microwave absorbing performance, adjustable size and composition and the like as well as a preparation method and an application of the magnetic nanoring microwave absorbing agent. A magnetic nanoring adopts a polycrystalline structure formed by agglomeration of nanocrystallines and is oval, the length of a long axis is 28-175 nm, the length of a short axis is 18-130 nm, and the ring wall thickness is 7-35 nm; the magnetic nanoring comprises the component of Fe3O4, Fe3O4 / C or Fe / C with a spinel structure; ferric glycolate is taken as a precursor, and the magnetic nanoring is prepared by adopting an inert gas protective carbothermic reduction method-carbonization-solid-phase diffusion growth cooperation mechanism. The preparation and the application of the magnetic nanoring microwave absorbing agent are simple in process, low in cost and high in efficiency and facilitate industrial application and popularization, and the Fe3O4 and the carbon-magnetic nanoring have broad application prospects in the aspects of microwave absorption, a catalyst, an electrode material, a magnetic recording material, a biological sensor, separation or medical imaging.

The invention discloses a method for preparing a silver / carbon composite nanoring structure by laser. The method comprises the following steps of (1) preparing a 0.5mM silver nitrate ethanol solution in a sun shielding way; (2) removing a 3ml silver nitrate ethanol solution, and placing in a quartz tube which does not absorb laser; and (3) connecting a 1064nm millisecond pulse laser with a 1064nm nanosecond pulse laser by a connecting device, ensuring to maintain the laser emitting time of the millisecond pulse laser and the laser emitting time of the nanosecond pulse laser to be in one pulse, and radiating the system by the connected pulse laser for 1second to 30 minutes, so as to obtain a dispersive silver / carbon composite nanoring structure with regular edges. The method for preparing the silver-based nanoring has the advantages that the environment-friendly effect is realized, the pollution is avoided, the simplicity and the rapidity are realized, and the shape of the prepared nanoring is novel and particular.

The present invention provides a “microminiaturizing method of nano-structure” with fabricating process steps as follows: First deposit the material of molecule or atom state on the top-opening of the nano cylindrical pore, which having formed on the substrate, so that the diameter of said top-opening gradually reduce to become a reduced nano-aperture, whose opening diameter is smaller than that of said top-opening; Then, directly pass the deposit material of gas molecule or atom state through said reduced nano-aperture; thereby a nano-structure of nano quantum dot, nano rod or nano ring with smaller nano scale is directly formed on the surface of said substrate, which being laid beneath the bottom of said nano cylindrical pore.

The invention relates to an annular Mg-Al double-hydroxy composite metal hydroxide and a preparation method thereof. The annular Mg-Al double-hydroxy composite metal hydroxide belongs to orthorhombic system and is layered, the internal diameter is 200-300nm, the external diameter is 700-800mum, the pore volume is 0.25-0.40cm<3> / g, the specific surface area is 54.37-83.26m<2> / g, the purity is high, and the degree of crystallization is good. The preparation method is characterized by using Mg10(OH)18Cl2-5H2O nano wires as the reaction precursor, dissolving urea and soluble Al salt in an organic solvent to prepare a reaction solution, adding the nano wires to the reaction solution to conduct solvothermal reaction in an enclosed system to obtain the annular MgAl-CO3 hydrotalcite. According to the invention, the annular Mg-Al double-hydroxy composite metal hydroxide has unique morphology and excellent performance index, thus the annular Mg-Al double-hydroxy composite metal hydroxide has a wide application prospect in the fields of catalysis, adsorption, drug slow release, etc.

The invention discloses a multi-wavelength adjustable nanosensor capable of realizing Fano resonance. The multi-wavelength adjustable nanosensor comprises a substrate and a nanostructure arranged on the substrate, wherein the nanostructure comprises a cavity, an input waveguide, an output waveguide, double nanorings located in the cavity and a nanostrip located in the center of the double nanorings, wherein the input waveguide and the output waveguide are located on two sides of the cavity and oppositely arranged; the double nanorings comprise an outer nanoring and an inner nanoring which are distributed concentrically, and each of the outer nanoring and an inner nanoring comprises at least two symmetrically distributed split ports; the angle of a longitudinal direction, relative to an electromagnetic wave signal input / output direction, of any edge of the nanostrip is adjustable, so that the sensor realizing different transmissivity is obtained. The multi-wavelength adjustable nanosensor capable of realizing Fano resonance is designed on the basis of the principle of a metal surface plasmon effect, is simple in structure, convenient to manufacture, high in sensitivity and wide in adjusting range and is applicable to detection and monitoring in the fields of chemistry, medical treatment, environment and the like.

The invention relates to the technical field of metal nanomaterial preparation, in particular to a preparation method for silver nanorings. According to the preparation method, polyvinylpyrrolidone ofdifferent molecular mass is selected as a surface protectant, and silver nitrate is dissolved in a polyvinylpyrrolidone-ethylene glycol solution of small molecular mass in a freezing environment. Anions can be retarded or restrained from being reduced to zero-valent silver. Finally, formation of nanosilver particles jointly cladded and complexed by polyvinylpyrrolidone of big molecular mass and small molecular mass is benefited. Polyvinylpyrrolidone of different molecular mass is provided with different selective adsorptivity on silver, and different stability is provided with different influence degrees on growth rate of silver atoms along different crystal planes. Generation of the silver nanorings is benefited more; and meanwhile, productive rate is higher. According to the preparationmethod for the silver nanorings, the silver nanorings prepared are proved with prefect circles, smooth surface and oval sections; and moreover, the silver nanorings are provided with outstanding crystal structures and can be used as a transparent flexible conductive material.

One-dimensional ring structures from M13 viruses were constructed by two genetic modifications encoding binding peptides and synthesis of a heterobifunctional linker molecule. The bifunctional viruses displayed an anti-streptavidin peptide and hexahistidine (SEQ ID NO:4) peptide at opposite ends of the virus as pIII and pIX fusions. Stoichiometric addition of the streptavidin-NiNTA linker molecule led to the reversible formation of virus-based nanorings with circumferences corresponding to lengths of the packageable DNAs. These virus-based ring structures can be further engineered to nucleate inorganic materials and form metallic, magnetic, or semiconductor nanorings using trifunctionalized viruses.

The invention discloses a high-temperature-resistant epoxy resin powder coating. The coating is composed of, by weight, 20-40 parts of nanometer SiO2 epoxy resin, 1-3 parts of low-melting-point glass powder, 1-5 parts of curing agents, 1-5 parts of fire retardant, 10-30 parts of mica powder, 10-30 parts of calcium silicate, 0.1-1 part of degassing agent, 0.1-1 part of flatting agent, 1-10 parts of chromium copper paint and 0.1-1 part of antioxidant. Compared with an organic silicon powder coating, the high-temperature-resistant epoxy resin powder coating is lower in cost, has excellent heat-resistant capacity and insulating property, and can be widely applied to coating of household appliances and electrical insulating materials.